OF THE SPERM WHALE* 
107 
OF THE LARYNX. 
i( The larynx in most animals living on land is a com- 
pound organ, adapted both for respiration, deglutition, 
and sound, which last is produced in the action of 
respiration ; but in this tribe, the larynx I suppose is 
only adapted to respiration, as we do not know that 
they have any mode of producing sound. It is com- 
posed of os hyoides, thyroid, cricoid, and two arytsenoid 
cartilages, with the epiglottis. It varies much in struc- 
ture and size, when compared in animals of different 
genera. Those cartilages were much smaller in the 
bottle-nose of twenty-four feet long, than in the piked 
whale of seventeen feet ; while the os hyoides was much 
larger— I could not observe anything like a thyroid 
gland.” 
OF THE LUNGS. 
“ The lungs are two oblong bodies, one on each side of 
the chest, and are not divided into smaller lobes as in 
the human subject. They are of considerable length, 
but not so deep between the fore and back part as in 
the quadruped, from the heart being broad, flat, and of 
itself filling up the fore part of the chest. They pass 
further down on the back part than in the quadruped, 
by which their size is increased, and rise higher up in 
the chest than the entrance of the vessels, coming to a 
point at the upper end. 
From the entrance of the vessels, they are connected 
downwards along their whole inner edge by a strong 
